You are looking for P/N 213224 if you want the whole assembly, P/N's 213225 and 213226 if you want just a lens and the gasket for same. An alternative is to use one from a parts car...any Later 1952 (Manhattan/deLuxe type with large tail lights, one piece windshield, etc) or 1953 can be used as a "donor" car...it does not have to be a Dragon. This is per group 30.0702, page 20 of the February 1953 Parts list covering changes on 1952 and 1953 model year Kaisers (use this with the 1951 illustrated Kaiser book).